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Definition of a Ring Main Unit

A Ring Main Unit (RMU) is a set of power transmission and distribution equipment (high-voltage switchgear) housed in a metal or non-metal insulated cabinet or designed as an assembled modular ring power supply unit. Its core components include load break switches and fuses. RMUs are characterized by their simple structure, compact size, low cost, and the ability to improve supply parameters, performance, and safety.

Advantages of a Ring Main Unit

1. High Reliability

   • The RMU adopts a fully enclosed design, effectively preventing environmental influences, minimizing fault rates, and significantly improving power supply reliability.

2. Strong Safety

   • Equipped with comprehensive protection devices, such as overload and short-circuit protection, ensuring the safety of both equipment and personnel.

3. Easy Maintenance

   • Modular design simplifies installation and maintenance, reducing operational costs.

4. High Adaptability

   • Suitable for various environmental conditions to meet power distribution needs in diverse scenarios.

 

Classification of Ring Main Units

1. By Structure

   • Fixed RMU: Suitable for long-term stable operation.

   • Movable RMU: Ideal for scenarios requiring flexible layout.

2. By Insulation Medium

   • Air-insulated RMU: Uses air as the insulation medium, offering lower costs.

   • Gas-insulated RMU: Uses SF6 gas (Sulfur Hexafluoride) for superior insulation performance.

3. By Function

   • Load Break Switch RMU: Used for switching load currents.

   • Circuit Breaker RMU: Provides protection and control for power lines.

Key Application Areas

1. Urban Distribution Networks

   • Used for branching and access points in urban grids, ensuring stable and efficient city power supply.

   • Example: In a certain city, RMU coverage reached 95%, effectively improving supply reliability.

2. Industrial Parks

   • Provides reliable power supply to industrial users, meeting high-load production demands.

   • Example: In a large industrial park, RMUs process millions of kilowatt-hours of electricity daily.

3. Commercial Centers

   • Ensures safe and stable power supply for large commercial complexes, supporting round-the-clock operations.

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A To ensure the reliable operation and longevity of a capacitor bank, it is essential to establish a comprehensive maintenance process. This includes conducting regular inspections and cleaning to prevent damage and corrosion, while keeping the cabinet and its surroundings free from dust accumulation. Monitoring voltage and current is crucial for proper operation, along with checking the power factor for optimal performance.Temperature control should be maintained within the specified range to prevent overheating, and good ventilation must be ensured. Periodic insulation and functional tests should be conducted to confirm normal operation, with detailed maintenance records kept for reference. For complex repairs, consult professional technicians and adhere to the manufacturer's guidelines. Always prioritize safety by disconnecting power before maintenance and following established safety protocols. Additionally, keep the capacitor bank away from humid environments and provide ongoing training for maintenance personnel to familiarize them with best practices. By following these steps, you can extend the lifespan of the capacitor bank and ensure its reliable operation.

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Depends on your request, we have standard models in stock.

A We have QC team comply with TQM to ensure the quality. Each step is in compliance to the standards. At the same time, we will take photos and shoot video for you if you need.

A For customized products, we will quote after you provide the requested product details within 48 hours because we need the time to calculate the cost, but we will quote as soon as possible.

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